Abstract: Image conversion method and apparatus that provides for (a) storing in a first memory a first image field; (b) storing in a second memory a second image field; (c) reading the first and the second memories; (d) simultaneously displaying on a display screen the first and the second image fields as a single image frame; and (e) while performing the step of reading the method includes a step of storing in a third memory a third image field. The first, second and third memories are provided as a frame buffer having a 3.times.3 memory block organization. For image fields numbered 1, 2, 3, 4, 5 . . . n . . . the system of the invention reads the image fields two at a time in accordance with a predetermined sequence given by: 1 and 2, 2 and 3, 3 and 4, 4 and 5, (n-1) and n, n and (n+1). A high resolution frame length is selected to be longer than or shorter than a television field period.

Abstract: A sequential process-pipeline (12) has a first processing stage (30) coupled to a CODEC (24) through a plurality of buffers, including an image data input buffer (28), an image data output buffer (26), and an address buffer (34). The address buffer stores addresses, each of which identifies an initial address of a block of addresses within an image memory (22). Each block of addresses in the image memory stores a block of decompressed image data. A local controller (18) is responsive to the writing of an address into the address buffer to initiate the operation of the CODEC to execute a Discrete Cosine Transformation Process and a Discrete Cosine Transformation Quantization Process.

Abstract: A system suitable for use on a computer network provides a user interface on a local node and an application to be run on a remote node. An application for accepting input from the user and translating it to appropriate commands for the remote application is divided, and located partially on the local node and partially on the remote node. That portion located on the local node gathers any information required from the user and transmits it to the portion located on the remote node in an efficient manner. The remote location portion uses the transmitted information to interface with the remote application and obtain results. The results are collected and transmitted to the local portion, from which they are returned to the user.

Abstract: For encoding a stream of k-bit data bytes into a stream of m-bit code bytes satisfying given constraints, a coding principle and coder apparatus are disclosed which allow pipelined and parallel handling of the byte stream. Each data byte DB and an associated coder state indicator S are together converted into a code byte CB. The coder state indicator S(i) to be associated with a data byte DB(i) is obtained by logically combining the coder state indicator S(i-1) of the preceding data byte DB(i-1) and a state transition indicator T(i-1) derived from the latter. This allows the simultaneous generation of all coder state indicators S for a whole group (a word) of data bytes, thereby enabling the parallel and pipelined operation of the coder.

Abstract: A method for providing synchronous message transfer is provided in an asynchronous operating environment in which conversational status can be established between communicating endpoints. The operating environment includes a transaction processing system having a plurality of terminals, a data communication component (DCC), and a transaction processor (XP) which exchanges message data with DCC for transmission to selected terminals. The method steps comprise ascertaining at the DCC whether a transaction initiated by a message is synchronous or asynchronous; passing the ascertained transaction from the DCC to the XP for generating a response; and processing the responses to synchronous transactions in progress, while retaining the responses to asynchronous transactions until the synchronous responses are completed.

Abstract: A high sensitivity, low noise, broad bandwidth channel conduction field sensor device is described. The conductive channel is configured to create an exceptionally narrow, undepleted conduction channel of approximately filamentary form. The filamentary conductive channel so formed is provided with a source at one end of the channel and two or more laterally spaced drains at the other end thereof. Electric or magnetic fields may be utilized to deflect a stream of charge carriers traversing the conductive channel from the source toward the drains utilizing the depletion width modulation effect of the fields upon the boundaries defining the conductive channel portion. Modulation of the depletion zone width and depth along the channel sides effectively moves the stream of carriers and the conductive channel area to overlap one drain more than another. This develops a differential drain current balance which can be utilized to provide an output signal.

Abstract: A loop system couples a CPU channel to bulk storage devices via a loop controller and device adapter. The loop system is characterized by equal fixed-length, multi-byte frames, each frame of which being assignable to only one terminal at a time. The system is further characterized by having a fixed loop delay greatly exceeding the frame duration by virtue of the high data rate.Dynamically variable frame assignment occurs when the primary terminal generates an unassigned empty frame in response to each assigned full (read) frame from a secondary terminal. The primary further generates an assigned full (write) frame upon receipt of each service (write) request frame from a secondary terminal. Lastly, the primary can send access command frames for each received unassigned empty frame or any other frame that does not imply a demand for bandwidth by the secondary.